Comparative Micro-computed Tomographic Evaluation of the Sealing Quality of ProRoot MTA and MTA Angelus Apical Plugs Placed with Various Techniques

Introduction: This study compared the effects of different mixing and placement techniques on sealing of ProRoot MTA (Dentsply Maillefer, Ballaigues, Switzerland) and MTA Angelus (Solucoes Odontologicas, Londrina, Brazil) apical plugs using micro computed tomographic (micro-CT) imaging. Methods: Standardized divergent open apex models were created using 120 extracted maxillary incisors and divided into 8 groups (n = 15). ProRoot MTA and MTA Angelus were mixed manually or mechanically and introduced to form apical plugs by hand condensation or indirect ultrasonic activation for 10 seconds. The samples were scanned using micro-CT imaging, and volumetric analysis of the voids between the dentin walls and the apical plugs and the porosity inside MTA was performed. Results: Irrespective of the mixing and placement techniques used, the voids between the dentin walls and the apical plugs in the MTA Angelus groups were greater than those in the ProRoot MTA groups (P .05). Conclusions: ProRoot MTA showed better marginal adaptation than MTA Angelus. Mechanically mixed products had better handling characteristics than the manually mixed product. Indirect ultrasonic activation did improve the adaptation of manually mixed MTA Angelus to the dentin walls

Examination of the prevalence of periapical lesions and technical qulity of endodontic treatment in a Turkish subpopulation

Objective. The objective of this study was to investigate the prevalence of periapical lesions by evaluating the periapical status and to evaluate the relationship between the technical quality of endodontic treatments and presence of periapical lesions in a Turkish subpopulation

Surgical management of overfilling of the root canal: A case report

Overfilling of the root canal is one of the most common errors encountered in dental practice. A 40-year-old woman complained of paresthesia and swelling affecting the left side of the mandible. Panoramic radiographs revealed that the root canal was overfilled; endodontic restorative material extended as far as the mandibular angle. Several months after surgical removal of the tooth and excess filling material, the symptoms subsided

Surgical Retreatment of an Invaginated Maxillary Central Incisor Following Overfilled Endodontic Treatment: A Case Report

This case report presents the periapical surgical retreatment of an Oehlers Class III invaginated maxillary central incisor with extruded root canal filling into the periapical lesion. After local anesthesia, a full-thickness mucoperiosteal flap was reflected, and the granulomatous tissue and extruded gutta-percha points were curetted carefully. A deep and wide root-end cavity was prepared and filled with mineral trioxide aggregate (MTA). At 6 months and 2 years after the treatment, the tooth exhibited no clinical symptoms, and the radiograph performed during the 2-year follow-up showed a complete periapical healing around the root end. The present report indicates that MTA retrofilling can be used successfully in the surgical retreatment of dens invaginatus type III cases in which the invagination exits apically. (Eur J Dent 2010;4:324-328)</jats:p

Reactions of connective tissue to compomers, composite and amalgam root-end filling materials

Aim To evaluate the subcutaneous connective tissue reaction to compomers, composite and amalgam root-end filling materials

Reactions of connective tissue to mineral trioxide aggregate and amalgam

The purpose of this study was to evaluate the subcutaneous connective tissue reactions to ProRoot, mineral trioxide aggregate (MTA; Dentsply), and Oralloy, high-copper amalgam (Coltene). These materials were placed in polyethylene tubes and implanted into dorsal connective tissue of Wistar albino rats, and tissue biopsies were collected and histologically examined 7, 15, 30, 60, and 90 days after the implantation procedure. The presence of inflammation, predominant cell type, calcification, and thickness of fibrous connective tissue were recorded. Scores were defined as follows: 0, none or few inflammatory cells, no reaction; 1, 150 mum. Necrosis and formation of calcification were recorded. Both materials were well tolerated by the tissues in a 90-day evaluation period. One notable finding is the presence of dystrophic calcification in connective tissue adjacent to MTA; this finding is consistent with the hypothesis of hard tissue induction by this material

Acute Subdural Hemorrhage While Traveling by Bus: A Risk Factor in the Elderly?

A 71-year-old man was delivered to our emergency department by an intercity bus. About 4 hours into a journey, he had complained of a headache to his wife. After one more hour, she noted a change in his level of alertness and notified the bus driver. A computed tomography scan of the head showed a subdural hemorrhage